Cita APA (7th ed.)

Garvin, C. D. (1981). Contemporary group work. Prentice-Hall.

Cita Chicago (17th ed.)

Garvin, Charles D. Contemporary Group Work. englewood Cliffs, N.J: Prentice-Hall, 1981.

Cita MLA (9th ed.)

Garvin, Charles D. Contemporary Group Work. Prentice-Hall, 1981.